This is a vintage 9ct armorial signet ring featuring ‘a dexter arm embowed in armour, the hand holding a dagger erect.’
The details are particularly interesting:
The hand: Appears to be wearing a gauntlet.
The arm: Shows engraved sections resembling armour.
The weapon: A straight, upright blade with a crossguard.
The lower section: Possibly decorative armour or a cuff.
This type of crest appears in British and Scottish heraldry, including historical family signet rings.
Material: Solid 9ct gold with C&F sponsor mark and London assay
Weight: 9. 3g
Size: M.5 / US 6.5 and sizeable